My 13 year old daughter as just started her periods (june )and they have been irregular with long periods . her period started yesterday and this morning she experienced sone clotting with heavy flow . is this something to be concerned about?

Early cycles: Young women often do not ovulate much the first year of menses but the estrogen driving the changes will bring on cycles. Irregular flow cycles occurring from 2 to 10 weeks are occasionally seen. The longer intervals may trigger heavier or longer flow. Once they begin to ovulate on a regular basis (6 mo-1 yr)a 2nd hormone stabilizes the pattern.